Introduction to Physical Sciences - Final Exam You can use g = 10 % . Extra credit is towards the end. 1. See Figure 1. Light strikes the glass at an angle of 30' . Take the index of refraction for air to be equal to 1 and the index of refraction for glass to be equal to 1.5 . Find the angle of refraction. Figures 01 = 30' air glass Figure 1